This paper explores the distribution of nasal-prefix verbs in a range of varieties of Sasak, using data from elicitation, narratives, conversations and experiments to determine how these different varieties employ nasal-prefix verbs and which functions such verbs carry out. 1.
Secretions from the sinuses cause blockage of the nasal passages which causes coughing due to post nasal drip. Coughing may be severe, followed by gagging and even vomiting. It tends to be worse at night. Here are the symptoms of a sinus infection. Often a sinus infection or sinusitis can be mistaken as a cold, since the symptoms are so much alike.
Some people feel worse during the day than at night. Among all the other good reasons listed here (end of the day, circadian rhythms, etc.) I think there's an additional reason: I had an allergist tell me it has to do with ions in the air, and the ions are charged differently in the day than they are at night.